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TPS56637: PSPICE FOR TI MODEL Input Current Not As Expected

Filipe Rubinstein
Intellectual 931 points
Part Number: TPS56637
Other Parts Discussed in Thread: PSPICE-FOR-TI

Hi all, 

I am currently experiencing an issue with the TPS56637 model in the PSPICE for TI Library. I am currently trying to model the power efficiency of this model using my own project, and am expecting greater than 90% efficiency. The output current and voltage waveforms look to be correct at steady state, as well as the input voltage waveform, but the input current waveform is too high to achieve the above stated efficiency. In addition, the input current waveform continues to rise as the simulation goes on. 

Please advise on what I am doing wrong with my setup attached below, or if there is an issue with the model. I have already discussed this problem with PSPICE-FOR-TI experts, and have directed me to here. 

Thank you, 

Filipe Rubinstein

TPS56637RPAR Buck Solution 2-2020-09-01T15-29.zip